package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 用户登录
     * @param employee
     * @param request
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(@RequestBody Employee employee, HttpServletRequest request){
        //1.将页面提交的密码password进行Md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //2.根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();// 查询条件构造器
        queryWrapper.eq(Employee::getUsername,employee.getUsername());//类名::方法名。一般是用作 Lambda表达式
        Employee emp = employeeService.getOne(queryWrapper);//用户名在表中做了唯一约束，所以可以用getOne获取用户对象
        //3，如果没有查询到，则返回登录失败的结果
        if (emp == null){
            return R.error("登录失败");
        }
        //4，密码对比，如果不一致则返回登录失败的结果
        if (!emp.getPassword().equals(password)){
            return R.error("登录失败");
        }
        //5.查看员工状态，如果为禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0){
            return R.error("账号已禁用");
        }
        //6.登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     * 用户退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //1.清理Session中的用户id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 添加员工
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
        log.info("添加的员工信息：{}",employee.toString());

        //设置初始密码123456，但是要进行md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //设置创建时间，修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
        //获取当前登录用户的ID
//        Long empId =(Long)request.getSession().getAttribute("employee");
        //设置创建人，和最后更新人
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);

        employeeService.save(employee);

        return R.success("新增员工成功！");
    }

    /**
     *员工信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        log.info("page = {},pageSize = {},name = {}",page,pageSize,name);
        //构造分页构造器
        Page page1 = new Page(page,pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        //添加过滤条件,当name不为空时，才会执行
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        //执行查询,并不需要返回值，查到的数据自然会封装到Page对象中去
        employeeService.page(page1,queryWrapper);

        return R.success(page1);
    }

    /**
     * 根据id修改员工信息
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
//        Long empId = (Long) request.getSession().getAttribute("employee");
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    /**
     * 根据id查询员工信息，vue动态绑定数据
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        Employee employee = employeeService.getById(id);
        if(employee != null){
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }


}
